Capping arrangement for electronic valves



Dec. 19, 1944. B. ERBER CAPPING ARRANGEMENT FOR ELECTRONIC VALVES Filed Nov. 25. 1942 2 Sheets-Sheet 1 Inventor ernfiard [7661* y M Dec. 19, 1944. B. ERBER ,39

CAPPING ARRANGEMENT FOR ELECTRONIC VALVES Fil ed Nov. 25, 1942 2 Sheets-Sheet 2 F/G. /O.

Inventor errzfiard [rZer Patented Dec. 19, 1944 CAPPING ARRANGEMENT FOREIi-ECTRONIC VALVES Bernhard Erber, London, England Application November 25, 1942,'SeriaI NmAGESSQ In Great'Britain March lfi, 1M2

9 Claims. (Cl. 25027.5)

Thisinvention relates to electronic valves and itreiers particularly to .the mounting of the .cap

pon the bulb and theconnection of the leading in wires to the pins or other contacts on the cap.

As hitherto constructed a cap is employed which is of such form that th copper or other leading in Wires have to be passed throughholes at the bottom of the cap and usually through the .pins, which in this case are of tubular form the bodies of the pins being moulded into the Bakelite or other material of which the cap is formed, the outer ends of the wires being each secured to one endof the protruding part of apin by solderingit tosaidpin. In such cases, as those in which the pins are solid rods or split longitudinally, the wire is passed through a hole in the Bakelite cap and is soldered to the pinsnear the point at which the pins aremouldedin the cap.

Thenumber of pins may vary according to the valve andmay be from 4 to 9 through each of which a wire has tobe'threaded.

This threading of the tubes with the wires requires considerable care, first in finding the right hole-for aparticular wire, and secondly in avoiding short circuitsdue to two Wires being crossed, the operatives, usually girls, .requiringconsiderable training before they obtain the necessary degree of skill toenable production to reach a satisfactory degree. The presentinvention has for its object certain improvements whereby the aforesaid objections may be overcome.

In accordance with the present invention, instead of formingholes in the cap for the passage of the Wires the said cap'is provided withlongitudinal slots or grooves said slots orgrooves' extending from the outer periphery of the cap to the pins one slot or groove being provided for each pin and also the pins themselves may be providedwitha longitudinal slot oropening. Th term incisions as used in someofthe appended claimsis to be understood asto include 'the slots as well as the grooves justmentioned, regardless of any special-metl'iod .for forming such slots or grooves. The wires-coming out of the valves are put/into the-slots or grooves .as the case maybe and the cap is fixedin the normal way and the wires'soldered at the end of theslotted pin orat any. other convenient point when the pin has no slot. Thesame arrangement can be used for caps with side contacts.

To preserve the strength of the cap a tube or ring may be pushed over the cap and this tube can be made from either Bakelite, metal or any cued-by theslots. "Thistuberoan be builtalso as a cap :havingarim 'at' the bottom or-with a bottomwith-holes 'ofanyshape sothatthis cap can be pushed 'over the slotted cap. The length of this second .cap need not necessarily be that of the slotted cap. This cap or ring may only be necessary'when .applyingithe cap tcthe bulb and may be later removeds'hould itbe foundthat the capzis sufhcien'tly strongwithout'it.

In order thatthe invention maybe'the better understood, reference is made to theaccompanying drawings in which:

.Fig. 1 is a view showing the generalt'appearance of .a valve embodying the present invention.

Fig. "2 isa plan as seen from the'l'ower end of the valve.

Fig. 3 a sectional view of thecap and a strengthening'membertaken upon line A--A Fig. 2,.1ookingin the direction off-the arrow X.

Fig. '4 is a plan with the strengthening cap'removed.

Fig. '5 1s aside view of the cap with the strengthening, member omitted.

Fig. 6 is a plan of one form :of strengthening member removed from'the cap.

Fig. 7 is a plan .of an alternative form of a strengthening cap, to wit, oi the trengthening cap which isshown in sectionin Figure 3.

Fig.'8'isia'p1an showing an alternativeform of the invention inwhich grooves are provided for the leading'in wires in place of slots.

Fig. 9 is a sectional view showingmore clearly the arrangement .of the leading in wire where grooves are usedinplaceof slots.

Fig. 10 is an elevationalview of a valve having side contacts.

Fig. 11 is a plan of the lower end of a valve having. side contacts according toFig. 10.

Fig. 12 is an elevational 'view showing a modified arrangement to that shown in Figs. 10 and 1 1 and v Fig. 13.is a plan.

"Figure 14 is a perspective view of the sleeve cap.

Referrin to the accompanying drawings in which [indicates the-valveand '2 thecap, Bindicates slots extendingiengthwise of'the capand itCIUSSIthB. closed end-of the cap to thepins '4 as clearly shownin Figs. 4 and-5 (lithe-drawings.

In .orderto strengthen the cap a sleeve 6 may beprovided adapted tont tightly overthe canlts attachment ithereto being further assisted by he useqof asuitab le cement oradhesiva-or th attachmentof' the sleeve tothe'cap may-be'efiected other material sothat'the cap is no longer weak- I by means of ascreworbayonetioint connection.

being grooved to accommodate the wire.

Instead of employing a sleeve of the same length as the cap 2, rings may be provided Which may be located at suitable points along the length of th cap to which they are secured by means of a suitable cement or adhesive should it be desired to retain the strengthening cap on the slotted cap after the capping has been effected.

The sleeve 6 may be open at each end extending the whole length of the capor built only as a ring on the top of the cap where the glass is cemented on the cap, or as shown in Figs. 1, 2 and 6 the sleeve may be closed at its lower end perforations to being provided for the passage e unsplit and the wires are soldered near the bottom of the cap, or alternatively they may be tubes or tubes with longitudinal slots.

Instead of extending to the pins 4 the slots 3 may stop at any point on the surface of the cap, the surface of the cap from this point to the pin An arrangement where the grooves start at a point short of the pins is illustrated in Fig. 8 of the accompanying drawings, where I indicates the grooves for the wires. If desired instead of slotting the body of the cap, grooves may be provided as indicated in Fig. 9 where a groove H is formed in the body of the cap from which a second groove l2 extends to the pin 4.

As already stated when applying the cap to the valve, the leading in wires a as they leave the valve are passed through the slots 3 or laid in the grooves ID or II as the case may be, the ends of said wires being either passed through the slots 9 in the pins and soldered to the ends of said pins, or where the pins are not slotted, the ends of the wires may be soldered to the pins at some convenient point.

In the case of valves having the contacts at the side of the cap as shown 'in Figs. 10 and 11, the contacts indicated by [2 are'secured in the known manner to the cap, the leading in wires being passed through slots 3 in' the sides of the cap and their ends soldered to the side contacts. It may be advisable to use slotted side contacts having a groove [3, on the bottom in which the end of the wire may be laid and soldered. This has the advantage that all contacts can be soldered to the'wires by dipping them in a solder bath in one operation.

Such an arrangement as that just described is shown in Figs. 12 and 13 of the accompanying drawings.

I claim:

1. For an electronic tube having leading in wires, a cap comprising a side wall and a bottom, contacts on said cap adapted to be connected with said leading in wires, and incisions in the side wall and in the bottom of said cap, extending from the open endof the cap longitudinally of said cap to its bottom and. across said bottom to one of said contacts.

2. For an electronic tube having leading in wires, a cap comprising a sidewall and a bottom, contacts on said cap adapted to be connected with said leading in wires, incisions in the, side wall of said cap, said incisions reaching from the outside through at least part of the thickness of said wall and extending each from the open end of the cap longitudinally of said cap and to one of said contacts, a portion of each incision which starts at the open end of said cap being in the form of a slot and the remaining portion of each incision being in the form of a groove.

3. For an electronic tube having leading in wires, a cap comprising a side wall and. a bottom, contacts on said cap adapted to be connected with said leading in wires, slots in the side wall of said cap extending each from the open end of the cap longitudinally of said cap, and a reinforcing sleeve fitting over said cap.

4. For an electronic tube having leading in wires, a cap comprising a side wall and a bottom, contacts on said cap adapted to be connected with said leading in wires, a slot in each contact, incisions in the side wall of said cap, said incisions reaching from the outside of said side wall through at least part of the thickness thereof and extending each from the open end of the cap longitudinally thereof and to the slot.

5. For an electronic tube having leading in wires, a cap comprising a side wall and a bottom, contact pins on the bottom of said cap adapted to be connected with said leading in wires, each of said contact pins having a longitudinal incision, and incisions in the side wall and in the bottom of said cap and extending each from the open end of the cap longitudinally of said cap to its bottom and across said bottom to one of said contact pins.

6. For an electronic tube having leading in wires, a cap comprising a side wall and a bottom,

hollow contact pins on the bottom of said cap adapted to be connected with-said leading in wires, each of said contact pins having a longitudinal slot, incisions'in the side Wall and in the bottom of said cap and extending each from the open end of the cap longitudinally of said cap to its bottomand across said bottom to the slot of one of said hollow contact pins.

7. For an electronic tube having leading in wires, a cap comprising a side wall and a bottom, side contacts on said cap adapted to be connected with said leading in wires, each of said side contacts having an incision at least at its bottom, incisions in the side wall of said cap, said latter incisions reaching from the outside through at least part of the thickness of said wall and extending each from the open end of the cap longitudinally of said cap and to the incision in one of said side contacts.

8. For an electronic tube having leading in wires, a cap comprising a side wall and a bottom, contact pins on the bottom of said cap adapted to be connected with said leading in wires, incisions in the side wall of said cap, said incisions reaching from the outside through at least part of the thickness of said wall and extending each from the open end of the cap longitudinally thereof, and a reinforcing sleeve fitting over said cap, said sleeve having a bottom part provided with individual holes for the passage of said contact pins.

9'. For an electronic tube having leading in wires, a cap comprising a side wall and a bottom, contact pins on the bottom of said cap adapted to be connected with said leading in wires, incisions in the side Wall'of said cap, said incisions reaching from the outside of said side wall through at least part of the thickness thereof and extending each from the open end of the cap longitudinally thereof, and a reinforcing sleeve fitting over said cap, said sleeve having a bottom part with a common opening for the passage of all said contact pins.

BERNHARD ERBER. 

